I love his picture, he's a cutie, and like you said you love him no matter what his size.
I've read this same concern on here many times before. Some Yt members purchased puppies and "PAID" a lot of money for a small puppy who grew to be larger than the breeder said. It can cause a slight dissapointment especially when you shell out the cash assuming your pup will stay a certain size or weight. They are a loveable breed no matter what size they get. lol